Jan 01, 2002St. Thomas a Becket, Cassville St. Thomas a Becket, Cassville Leave a Comment / By Rachael Orth / January 1, 2002 St. Thomas was organized in 2002. Return to the diocesan timeline. Related 'St. Thomas a Becket, Cassville' Topics Timeline Tagged Founding of a church | St. Thomas a Becket Cassville Click or tap on a topic or tag to see similar posts.